sData Create Sales Order Payload

SUGGESTED

Hi There... 

I'm working on an ecommerce integration using sData ( and PHP ) and I'm having trouble trying to create a sales order. I'm getting a message "This Order has no lines and has zero total amounts" back from the server. I know the issue is with the Payload format. I'm trying to use the sample payload from the documentation. Can someone point me in the right direction?

This is the payload I'm using:

<sdata:payload>
<SO_SalesOrderHeader>
<ARDivisionNo>01</ARDivisionNo>
<CustomerNo>ALLSA</CustomerNo>
<SaleOrderLines>
<SaleOrderLine>
<ItemCode>010BLK</ItemCode>
<UnitPrice>10.00</UnitPrice>
<QuantityOrdered>1</QuantityOrdered>
</SaleOrderLine>
<SaleOrderLine>
<ItemCode>010BL</ItemCode>
<UnitPrice>10.00</UnitPrice>
<QuantityOrdered>1</QuantityOrdered>
</SaleOrderLine>
</SaleOrderLines>
</SO_SalesOrderHeader>
</sdata:payload>

I know I have long ways to go, but I just need to get through this current error.

Any help will be appreciated.